Filter



Man- 21, 1950 c. J. ROHLAND 2,501,532

" FILTER} Filed fla 12', 1945 2 Sheets-Sheet 1 INVENTOR.

Gart a); /?ofi7and March 21, 1950 c, J, RQHLAND 2,501,582

FILTER Filed May 12, 1945 2 Sheets-Sheet 2 uvmvrm Caz-6e Bahia/7d to provide members Of two different shapes, aseach cut with each diameter extending edge to semblin'g one shape between the other shape, in edge along the length of the strip. order that the cells of the filter ma be provided. Fig. 6 is a plan view of a member similar to Fig.

One of the objects of this invention is to provide 2 but oi. a modified form. a filter element formed from identical members 5 Fig. 7is asection in line 1-1 of Fig.2. and yet provide the cell type construction'of ele- Fig. 8 is a section similar to Fig. 7 but-of modiment as above referred to. fled construction. Another object of this invention is to so shape Fig. 9 is a section on line 9-9 of Fig. 6.

the identical members that cells ma be formed 0 In proceeding with this invention, I out a pluby different orientation of the members about a rality of identical members from web stock of a common axis. predetermined thickness, usually in roll form. Another object of the invention is to provide a each of themembers having an opening, which shaping of the members so that a saving of maopenings are all in registry when the members are terial may be provided in cutting the members. stacked one on top of the other, providing the from web stock. central axis of the filter element. A portion of Anoth r O je of the inven ion is the shapin the web stock extends about the axial opening and of the members so that they may be out in an inthen additional portions radiate from this clos- -opening, without the removal of stock 01 the Patented Mar-.21, 1950 i 2,501,582

UNITED STATES PATIENT, orrica FILTER.

Curt J. Rohland, Scekonk, Mass, assignor to Corporation, a corporation of Rhode 18- Application May 12, 1945, Serial No. 593,354

8 Claims. (or 210-469) This invention relates to a filter element for such as shown in Fig. 2, superimposed one on the removing contaminant from a liquid, and more other with one oriented about the central axis. particularly to a removable cartridge which may. Fig. 4 is a top plan view, showing three of the be inserted in a casing and removed therefrom members such as shown in Fig. 2 in their proper after contaminant has been collected in the car- 5 relative positions, each oriented with respect to tridge. n the other about the central axis.

In the use of cell type filters, such as that made Fig. 5 is a top plan view of a strip of stock from paper or of some porous stock of the type shown with the members such as shown in Fig. 2 generally shown in the patent to Malanowski intermeshing for the utilization of a greater 2 3 dated ua y 1942, t is ce sa y 1 amount of the sheet strip than were the members termeshing relation, one with the other, so that ing portion to provide spokes which divide the portions of one may extend into recesses between member into equal angular segments. Between portions of the other in the ribbon web from at least two of the spokes the stock extends ra-. which they are cut. dially outwardly to provide a sector,,while be- Ane er Objec o the invention 5 to p i e tween at least two of the spokes, andlwhich may a long le t of Conduits connected. e 10W be the same two spokes but over a dffierent anpressure side of the filter for the passage of fllgular osition,- a spac is provided. In assemra e from he fi r ele bling the members, I orient one member relative Another object of this invention is to provide a to the next member or an adjacent member about Short passage or e fi e uc s y he o the central axis, so that the sector between two matlon of Oil chann ls in pokes which radiate spokes of one member is positioned over a space from the centra axis an prov dea m n mum flow between spokes of an adjacent member. A still distance t h fil r e h nn l 40 further orientation of the next or an adjacent Another object of the invention is to provide 011 member 1 provided, that a further uncovered channels which may connect with the central space may be covered by the sector f the t,

member. An orientation occurs in an amount members equal to the angular distance between spokes un- A further object of the invention is to provide til all spaces are covered and then a repetition of ggg g sumcient strength to avoid rupture this arrangement occurs. Thus, there is provided with the'se and other objects in View, the a plurality of cells, each bounded by two sector vention consists of certain novel features of conportions of a m and one or more. spokes struction, as will be more f ll described and of the intervening members. 'lhe arrangement particularly pointed out in the appended claims. is Such that mechanical hendlmg may be had w th reference t t drawings: for assembly. Any number of spokes, which are Fig. 1 is a sect onal view showing a filter case equally distanced from one another, m be p with a filter element of the construction of this Vided, and the orientation of adjacent members invention positioned therein, said element being will be successively had in the m n s f he ansectioned on line l-l of Fig. 4. 8111 i nces.

Fig. 2 is a top plan view of one of the members Filtering takes Place o h h p p r o h which forms a stack 01' identical members in the mem ersand between the members from a cell filter element. to the central axial opening and conduits radi- Fig. 3 is a top plan view of two of the members, ating from the central. opening are provided in each of the's pokes of 3' i 4 each member. The flow through orbetween-the paper members takes place slowly and the conduits in the spokes may be of relatively small cross section and yet transmit the entire oilflow without any increase of a V amazes outwardly of the spoke inwardly to a slot ,3

pressure beyond that existing in the return passage of these conduits. Because of this verylong conduit it may be extremely small in cross section and thus there may be provided a minimum width spoke and a maximum contaminant collecting cell.

With reference more specifically to the drawings, l designates a filter casing or shell having a bottom H, and cylindrical side wall l2. A removable cover I3 is provided at the upper edge of the cylindrical wall I2 and is held in sealed relation to the shell by means of a resilient gasket I4. A center tube |5 extends upwardly from the bottom wall II and the cover it is held on to the cylindrical shell by means of a bolt It with a head I! engaging the cover and having threaded engagement'as at It with the center tube I5.

An inlet opening is provided at l9 while a center 2 the subject of this invention, is designated generally 2| and consists of a stack of identical members superimposed one upon the other and held in assembled relation to provide a removable unit which may be positioned within the casing |0 so that the same will rest upon a sealing gasket 22 engaging an abutment 23 and is sealed at its upper end by sealing gasket 24 engaging the upper end of the unit, the same being pressed downwardly by spring 25 which encircles the bolt IS.

The unit 2| is composed of identical members 26 shown in plan view in Fi 2. Each of these is formed of paper, cardboard, or some filtrate transmittable material. The members each have a central opening 21, preferably of out of round shape so that an out of round spindle may be inserted for assembling the same in desired relative relation. This opening is surrounded by a closure portion 28 with a plurality of spokes 29 and 30 radiating from this closure portion 28. In the form which I have shown in Fig. 2 there are six of these spokes, arranged at equal angular distances around the closure portion 28, thus, in the complete circle the spokes are arranged 60 apart on their center lines. It is apparent however that other multiples may occur, for instance, there may be from two spokes up to an infinite number. Thespokes will be equally spaced about the circumference of the circle. In the example shown, the sheet paper stock extends between two opposite pairs of these spokes to provide sectors or webs 3|, 3| while between two spokes in another location, spaces 32 and 33 are provided. In the particular construction here illustrated, I have provided two sectors or webs 2| in diametrically opposite locations, while two sets of spaces 3232 and 33-43 are provided between spokes in diametrically opposite locations. Where the webs exist between the spokes, no line of demarcation between web and spoke occurs, as the same sheet of stock continues uninterruptedly from spoke to web.

Filter conduits are provided in each of the spokes 29 and 30. These conduits may take various forms, so long as the resultant effect is such as to provide a channel suflicient to conduct all.

of the filtrate to the center opening 21 which passes to these conduits. One form of such conduit. is shown as a zig-zag undulating wavy groove I5 in spoke 29 which extends from a point whichconnects with the centeropening 2! ofv the member. In the adjacent spoke 30 a similar undulating or wavy groove 31 is provided, ex-

tending from the slot 38 which connects with the center opening 2? of the member radially outwardly of the spoke. The grooves and 31 are opposite in form, that is, the crest of the wavy formation of the groove 35 would be opposite to The groove 35 or 31 is usually formed by a knife I which is somewhat V-shaped at its edge. This knife is brought down on to the member to be grooved and this member is backed up by some surface which may be more or less resilient. It is found that the cross section of the groove which is formed will vary, depending upon the character of the material or work which is impressed. For instance, if a very soft blotting like paper is worked upon, the resulting action of the knife edge will be somewhat as shown in Figure '7, that is, there will be a large, generally V- shaped, groove 40 provided on one side of the member and a shallow groove 4| opposite the groove 40 provided in the other surface of the member, leaving. a very thin fibrous structure between the two, designated 42.

In other instances, where a cardboard or stifier type of web is used, the groove formed by the same knife edge will be as illustrated in Figure 8, where there will be a V-shaped groove 43 in one side of the member and a projection 42 on the opposite surface of the member. In both the case shown in Figure 'l' and the case shown in Figure 8, the stock adjacent the groove surface will be somewhat more compressed than the remainder of the member acted upon.

In some cases the knife edge may cut completely through the member 26', Fig. 6, as shown at 45 in Figure 9, and in this case also the stock will be compressed along the conduit surface which is formed.

In some cases members which are grooved as shown in Figure 7 or 8 after use will have the stock, such as 42, cleared away so that instead of a groove being formed from one surface, a slot such as 45 extends through the member. These variations depend largely upon the character of stock used and the firmness with which the fibers of the web are matted together, an essential feature being that some conduit be formed which is of a size sufficient to conduct all the filtrate to the center opening 21 where no pressure exists. In none of these cases of forming a conduit is there present the problem of removing stock to form a slot, which is somewhat more diificult of performance.

in assembly, one member 26 is superimposed upon another member 26, so that the openings 21 will be in registry and extend axially of the structure, each superimposed member will be oriented the angular distance between the center of the spokes or in the illustration here presented through so that its web portions 3|, 3| will be placed over the spaces 32, 32 between spokes of the adjacent disc. The third member will be superimposed upon these two previous members by it being oriented 60 relative to the previous member so that its webs 3|, 3| will be located over the spaces 33, 33 in the first of the three members of the series. This same orientation through 60 of each succeeding disc will occur until the stack of members is built up to the required axial dimension. In this way a cell 39 will be formed between two web portions 3| and between the spokes of the two intermediate discs or members. A central opening 40 is provided in the stack, which will receive the center tube IS. The groove slots 35 and 31 will zig-zag across each other throughout the length of the spokes and any projection such as 44, Fig. 8, will not obstruct the groove beneath it.

The stack of members is provided with a metal bottom plate 46 and a metal top plate 41, which are held in assembled relation with the members by wires 48 located in notches 49 or other means, extending from one to the other at different locations.

In Figure 5 the members 26 are shown in overlapping relation by the spokes 29 of one member and 30 of another member extending one along the other in the web 50 from which they are cut.

I claim:

l. A cell type filter element comprising a stack of sheet members of identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member, and each member having uninterrupted webs of filtrate transmittable material with spaces between said webs, the webs of one member being difierently oriented about the axis of said opening from that of adjacent members whereby the spaces between the webs provide cells partially bounded by the webs.

2. A cell type filter element comprising a stack of sheet members of identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member, and each member having uninterrupted webs of filtrate transmittable material radiating from said opening, with spaces between said webs, the webs of one member being differently oriented about the axis of said opening from that of adjacent members, whereby the spaces between the webs provide cells partially bounded by the webs.

3. A cell type filter element comprising a stack of sheet members of identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member, each member having a portion forming a closure about said opening with spokes radiating from said portion, a radiating uninterrupted web of filtrate transmit: table material located between at least two of and the webs, and conduits in said spokes extending to the said center opening and terminating short of the outer ends of the spoke.

5. A cell type filter element comprising a stack of filtrate transmittable sheet members 01 identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member, each member having uninterrupted webs radiating from said opening over a portion of the arc of a circle, the webs of successive members being oriented through substantially the angle of said arc of a circle covered by said web untilthe circle is completed by said webs.

said spokes and a space between at least two of said spokes, adjacent members being oriented about the center of said opening substantially the angular distance between said spokes so that cells are formed by spaces located between said webs and are bounded by the spokes and the webs.

4. A cell type filter element comprising a stack of filtrate transmittable sheet members of identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member, each member having a portion forming a closure about said openingwith spokes radiating from said portion, a radiating web located between at least two of said spokes and a space between at least two of said spokes, adjacent members being oriented about the center of said opening substantially the angular distance between said spokes so that cells are formed by spaces located between said webs and are bounded by the spokes 6. A cell type filter element comprising a stack of filtrate permeable sheet members of identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member to provide a dischargeconduit, and each member having uninterrupted webs radiating from said opening, with spaces between said webs, the webs of one member being differently oriented about the axis of said opening from that of adjacent members, whereby the spaces between the webs provide cells partially bounded by the webs.

7. A cell type filter element comprising a stack of filtrate permeable sheet members of identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member to provide a discharge conduit, each member having a portion forming a closure about said opening with spokes radiating from said portion, a radiating web located between at least two of said spokes and a space between at least two of said spokes, adjacent members being oriented about the center of said opening substantially the angular distance between said spokes so that cells are formed by spaces located between said webs and are bounded by the spokes and the webs, and are open at the outside of the cartridge and conduits in said spokes extending to the said center opening and terminating short of the outer ends of the spokes.

8. A cell type filter element comprising a stack of filtrate transmittable sheet members of identical configuration in the same axial direction of the stack, each member having an opening for registering with a like opening in the next member to provide a discharge conduit, each member having a portion forming a closure about said opening with spokes radiating from said portion, a radiating web located between at least two of said spokes and a space between at least two of said spokes, adjacent members being oriented about the center of said opening substantially the angular distance between said spokes so that cells are formed by spaces located between said webs and are bounded by the spokes and the webs, and are open at theoutside oi the cartridge.

CURT J. ROHLAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,694,939 Heftler Dec. 11, 1928 2,204,592 Heftler June 18, 1940 2,269,725 Malanowski Jan. 13, 1942 2,283,629 Heftler May 19. 1942 2,859,475 Gauthier Oct. 3, 19 

